Air-valve for carbureters.



G. H. TABER.

Am VALVE ma @mmm-sns.

. MQPLCATION NLE!) NCIV. 24\ T915. 1,254,084. Patented, Jim. 22, 1918.

Patented Ja.n.22,1918.

2 SHEETS-SHEET 2.

G. H. TABEH.

AIR VALVE FOR CARBURETEHS.

APPLICATION FILED lNov, 24x 1915.

M5 @Rbot/14.

aio

UNITED STATES PATENT OFFICE.

GEORGE H. TABER, 0F BINGHAMTON, NEW YORK, ASSIGNDB TO THE TABEB CARBURETER COMPANY INC., OF BINGHAMTON, NEW YORK, A CORPORA- TION 0F NEW YORK.

Specification of Letters Patent.

Patented Jan. 22, 191s.

Application tiled November 24, 1-915. Serial No. 63,183.

To all whom it mag/concern:

Beit known that I, G'Eoncr.- H. TABER, a citizen of the United States, residing at Binghamton, in the county of Broom and State of New York, have invented certain new and useful Improvements in Air-Valves for Carbureters, of which the following is a full, clear, and exact description.

This invention relates to improvements in carhureters of the type shown and described inmy co-pendng application, Serial No. 26,684,1iled May 8,1915. y

The objects of my invention are 'to improve the air valve sothat it may operate with the minimum of friction, to balance and position the valve so that shocks and inclined positions of the carburetor will not affect the operation of the air valve, to automatically control the proportion of luy uid fuel to air by controlling the amount of auxiliary air admitted for high, low and medium degrees of en ine suctlon, to pro vide suitable setting cvices for adjusting the air valve at high, low and medium de grecs of suction so that adjustments may be easily made by inexperienced persons, to provide a conduit so shaped that the mix-- ture of fuel and auxiliary airis thoroughly interrnin led before it is admitted to the in` let mani old. This conduit is also Water jaclreted so that condensation is prevented. I also provide an' im roved configuration of the walls ofthe aux'i iary air passage so that the' air is warmed before cemmingling with the primary air and fuel. I also provide-an improved weather control device for the auixiliary air valve so `that the mammum opcningmay be controlled without 1n any wa -afectingthe valve spring tension.

`Ibiifconnection with vthe above mentioned main objects, I have perfected details and improvements in various parte, as will be pointed out hereafter.'

yIn the'drawings,

' Figure I isa side elevation of my im proved carburetor, the float chamber being shown incross section.

Fig.- 2 is` a seotionof valve taken on line 2-2 of Fig. '1 and looking in the direction of the arrows.

Fig. 3 is a detail view ofthe pivot bearing for the airvulve spindle.

Fig. f1 is a sectional View of conduit, sup plexnentary air passage and .essociaited parts.

Fig. 5 is a detail view of the air valve showing the position the controlling parts assume for medium and wide open positions.

Fig. 6 is a detail view of the air valve controlling stop.

Fig 7 is a detail perspective view of the zur valve showing the counterbalaneing weight thereon.

In the carburetor the vfloat chamber 10 '1s of the usual form and contains an annuhlr float 11. Asupply pipe 12 leads gasolene to a valti/le l, willich is normally held to its seay ere y c osin the su i b u. spring 14. When ghe lloatpldyfllgngivoted Wishbone 15 lifts .the valve and allows gasclene to flow into the float chamber until the float again rises. A priming pin 16 which extends upward from the stem of valve 13, is provided for priming the carbeineter. l Extending throu h the Hout chamber is a primary air tube l Extending verticall in this tube is a nozzle 18 which 1s provide with the usual needle valve 19 having a set ting handle at its lower end. Passages are provided to conduct' gasolene from the oat chamber to the inside. of the nozzle.' Adjocent the nozzle orifice the primaryair tube is restricted by a frusto conical member 21.

At the restricted opening at the lower 'part of this member the rimary air and fuel are intermixed. See` i .1. Thereafter the `mixture passes upward y past a butterfly throttle valve 22 just vbefore the primary mixture enters the throttle opening supple'- menta'ry orauxiliary air is added to it.V This air admitted by a valve which will be hereafter described.

The auxiliary air and primary@ air with intermixed asolene on their Way to the inlet manifolldy conduit. This branched `conduit 'is shown in Figs. 2 and 4, 23 being one branch and 24 the other. The mixture passes through these conduits asshown b'the arrows on Fig. 4. The outer side wal s of the conduit are provided with a water jacket 25-26, and the wall 2 7 which defines theinne'r edgej of the conduits 23--24 is elliptical in shape and extends from the front to the rear walls of 20 pass through a branched ooV air.

'rious other details `will now be pointed out.

T herspindlle 4G' is :valve the erige wall 43, as shown iii Fig. 5.

. the conduits to form a neck. The hollow tion is' prevented. Pipes 29 and 30 lead the water to and from the Water jackets. The

gases passing up the conduits23 and 24 are finally directed tion 31. The opposing streams of gases from the two conduits at the junction impact against each other and produce eddy currents which thoroughly mix the gases. Theseeddys are represented diagrammatically by the arrows in Fig. 4.

Self contained air warmer.

The auxiliary air which intermingles with the primary air below the throttle 22 is admitted by a swinging air valve 32, which will be hereafter explained. The passage 33 from the valve chamber 34 to convey the air to a point below the throttle .is arcuate and is so disposed that its inner wall is formed by the outer Wall 35 of the Water jacket 26. In this way the water jacket 26 also serves to heat the incominof auxiliary At the same time all of the lheating devices are self contained in the carbureter itself and it is unnecessary to apply external heaters to warm the auxiliary air.

Air valve. AIn

mounted on a horizontal piv'ot. I have tipping ofthe carbureter do'es notopen and close the valve. I have alsojound it advisable to offset ,the pivot-so that the of the opening movementof the valve.

Vaha ve been The valve 32 is rectangular in form and swings inwardly into the valve chamber 34s 56, 37 and 38 are extended to a valve chamber and the side llil-"of extends closely to the arcuate wall 43. i The vvalvev has integral with its rear face a curved lever or arm 44 which extends to a boss 45 through whichA extends the spindle 4G which forms a pivot for the valve. so locafedamlthc varcuate wall 443 is so shaped that uponv opening the -42 closely follows the Y arcuate 'lfhe e'ect of so shaping thesiirfaces 39, l0, 4.1 andf43 is to'admit all of the air between the edge 37 together at the upper juncmy co-pending application, of which this is an improvement, the air valve/'was improved, /as' of the valve and the surface 40 of the valvechamber. In order that the effective ofpenling` be greater during the early part o the Pz'vot'mounting and counterbalanqe for az'r valve.

As reviously'explained, the boss 45 has extending through it a spindle 46. The arrangement is such that the boss and spindle are `secured together and move in unison. The rectangular seat 47 of the valve is independent of. the valve chamber andl is secured thereto by screws 48. This seathas lateral extensions 49 and 50. lThese exten sions are bored and internally threaded to receive hollow externally threaded studs 51. The interior of these studs is of such dimension that the spindle 46 will fit loosely therein. The lower end of the' spindle is pointed at 52, and the stud is capped to form a bearing for the point ofthe spindle. By adjusting the lower 'of the studs the valve Spindle may be setto any desired vertical position and the flap valve thereby maintained inone set position. 'This is important as there is a tendency -When the valve shifts from on the seat-L At point bearing,-

dust is kept out 51 have annular kniirl'ed-heads 53, as shown in Figs.v land 3. 'The exterior unthreaded portion 54 ofl these studs also forms a bear- 'ing for other parts, which will be hereafter described. Extending from the boss 45, and .fjntcgral therewith, is an a'rm 55 which car' ries on itsl end a weight 56 sufficient to 'counteitbalance the valve 32. By means of this counterbalanc'e and by reason of the ver-.

ti/ca'll mounting of the valve, shocks and tipalij' valve.

L/l ir vilwcontrollny fle/vices.

Extending from the bossi45, which is integral with the ariil 44 carrying the air valve, is a li'ig or ear 57 which lis drilled` to rcceiviva pin which pi votally connects the v ear -17with a pair of links -at'their'opposite ends are drilled to' receive a pin which forms at ltheir opposite ends, are p'ivotally connectcil'to the blade spring (i2.y The relation ol the two pairs of links 5S 'and 60=is such lliiit as the flap.valvc 252 is'drawIl--inwztrd under the influence of vengine suetion, the

toward leakage place to .place- /pin/g of the carbureter in no way effect the .effective openingiis greater at the beginningA Y 58. These links a second pivot connection for asecond' pair of links-60' which,

which is disadvantageous. -I have devised aV control device which limits the'extent of movement of the air valve but does not in any way affect the initial tension. This con- `jcarriesat its end a the collar and the its 'the closed trol device can limit the movement of the air valve to'an desired extent or can keep it tightly close for starting, if desired.

This control device consists of a stirrup shaped yoke 80, which is journaled on the studs 5l on the unthreaded flut bottom v carrying ythe air valve. The yoke also is provided with a crank arm' 8,3 to which is connected any suitable controlling lever, as 84, Fig. 6. By moving this controlling 'lever the stirrup or. yoke may be set in any desired angular position, and in this way the extreme movement of the flap valve maybe limited without changing the spring tension. The yoke also acts as a. stop for the extreme movement of the flap valve for normal running, see Fig. Also this yoke 80, if set to extreme forward position, may be used for cutting olf all the auxiliary'air, thus giving a rich mixture for starting. ,k

I prefer to provide a resilient connection between the crank arm 83 of the control device-and the controlling lever 84. A stud 92 is swiveled on the end of arm 83 and this stud isfccntrally drilled to receive the control lever which passesl therethrough and collar 93. Intermediate stud is a spring 94. In. operatingin cold weather the Aspring 94 yields. slightly and thus allows the stirrup 0 to have a slight movement independentv of the control lever 94. The effect of this is to admit sullieient air for a very Jcold motor and thus prevent choking Tkrotle controlv devices.

' -The butterfly throttle valve 22 is mounted on spindle 85, which extends through the side wall ofthe carbureter and has secured to its end a vY-shaped member 86. A lug 87 coperates with the arm 88 ofthe Y member and the other arm. carries a screw which limposition ofthe throttle. the main arm of the Y member" is pivotal] connected a control lever' 89 which exten s to 'any desired point.

claim: 1. In an air valve structure rctors5 comprising, in` combinati l auxiliary aiil 'in lc't ol rectangular crfis .etion,v

a 'valve chamber having al plurality of straight. sidewalls andan arcuate si'cle wall extending 'to said reetangula r inlet, a swingiiig flap valve having three sides extending closely. to the straight sides lot the valve cliainliv and a fourth side extending closely lto the. ijeu'ate side wall of said chamber, a niet]V or. said valve positioned to cause said oil? carbuand thereafter compound last mentioned edge to closely follow the arcuate Wall on the'inward opening of the valve and means in operative association with said flap valvev for increasing the resistance to inward opening proportionally to en rine suction.

2. n ay carbureter, comprising, in combination, an auxiliary air inlet of rectangular cross section, an auxiliary air inletpassage of arcuate forni, a valve chamber intermediate said passage and said air inlet. having a plurality of straight side wallsand an arcuate wall extending to said air inlet. a swinging Hap valve having three sides extending closely to said straight side walls and a fourth side extending closely to said arcuate iva-lha ivfot for Said valve, said pivot being positioned to cause one edge of the valve to closely follow the arcuate wall on the inward opening of the valve and means in operative association with the valve for increasing its resistance to inward opening proportionally to engine suction.

3. In a carburetor, in combination, an auxiliary air inlet of rectangular cross section, a valve chamber ot' i'ectang ularscction on three sides, a swinging flap valve' of rectangular section having an otfset'liiiige, saidyalve on the inward. movement admitting air between one straight edge' of the valve and one of the straight rectangular sides of the valve chamber and means in operative association with Vthe valve forincreasing the resistance to inward opening proportionally to the increase in engine suction. 4. In a carbnreter, comprising, in coinbinatioii. an auxiliary air inlet of rectangular cross section, a swinging flap valve. of rectangular section and having an olfset hinge to cause i'a|.iid.eflective opening of the valve in the initial travel and means in operative association with the valve fox: in` creasin the resistance to inward opening proportionally to the increase in en ine suol tion, said means comprising abla e spring and means for progressively varying tlie action of the blade spring on the valve. In a. carbureter,l comprising, inv comi bination, an inwardly swinging flap valve,

a vertical pivot for said valve; means for holding said valve to its seat comprising a.' resilient member and 'n plurality of links coni'iecting said member and said valve,v said links being adapted on the inward movement ol* the valve to contact with the pivot resilient member.

combination. anint'we'en the valve and the 6. ln a carbnreter, in wardly opening Hap valve, a spring for holding said valve in -normally closed position. means .for variably l increasing vthe tension of the `spring upon the valve upon an increase of engine a sent therefor.

Ithe 'leverage betion, said means comprising a (ilurality of, links and means for compoun ing the aetion of said links at a certain point in the travel of the valve.

7. In a carburetor, in combinatioman inwardly swinging flap valve, a seat therefor, a spr-in forholdingV said valve toits seat,

means `or variably increasing the tension of the springupon .the valve upon an increase of engine suction, said means comprising a plurality of links adapted to compound at a-certain point in 'their travel, and means for varying said point of compounding at will.

8. In a carburetor, in combination, an in wardly openingiia valve, a pivot for said valve, a spring,` apiurality of swinging con* nectionsbetween said spring and said valve,

.means associated with the pivot for abut# ting against .one of the aforesaid connections,an'd thereby to compound the action of 'said connections whereby greater spring tension is progressively applied as the valve opens inwardly. l

9. In a carburetor, in combination, an inwardl swinging'tlap valve, a vertical pivot there or, said pivot comprising a spindle having a ointed end and means for supporting said spindle andv adjusting its vertical position, whereby the valve may be set `to any desired vertical position.

' '10. In a carbureter, in combination, an inwardly swinging flap valve, a' vertical pvot about which said valve is adapted to swing, and a counterbalance for said valve located l upon the opposite side of Said pivot from` said valve, said counterbalance and said .vertical pivot preventing vertical shocks orinclinations affecting the said valve.

`11. In a carbureter, in combination, an inwardly swinging Hap valve, means .for

pivoting said valve on a vertical axis comlprising a spindle attached to the valve,

means 'for supporting the lower end of the spin dlel and means for maintaining the spindle in vertical alinement.

12. In a carburetor, in combination, an

inwardly swinging flap valve, means in oplits resistance to inward opening proportionally to en ine suction, a yoke pivoted on the pivot of t e ii'ap 'and means'for setting said yoke in varying angular positions to limit the extreme movement of said ap valve.

`,1.4. In a carbureter, in combination, 'an

inwardly swinging ila valve2 an arm connecting said valve witits pivot, an abutment on said arm, a resilient means c0- operating with said arm for holding the Hap valve to its seat, a yoke member pivoted on the flap valve pivoted and havin a portion adapted to coperate with the a utment on the aforesaid valve arm to limit the angular movement of said flap valve and means for setting the said yoke 'member in varying angular positions.

15., An air-valve structure for 'carbureters, comprising a rectangular swinging iap valve, means in operative association with said flap valve for increasing its resistance to inward opening proportionately to the increase in engine suction, adjusting means Vfor varying the resistance tothe opening of the' valve, said means being adapted to ad-V just the resistance without aiecting the ini- `tial tension on the valve, and means for adyjusting the initial tension' on the saidswinging valve.

16. An air valve structure for carbureters,

comprising, .in combination, a swinging air valve, a blade spring for holding said valve to its seat and resisting the inward movement oi said valve under the influence of engine suction, a plurality of adjusting ioo ing airv valve of rectangular 4cross section, a spring for holding saidvalve to its seat und 'resisting the movement of said valve under the influenceof engine suction, means for varying the tension on said spring :under low, medium and high e'ngine suction, said means being independent one of the other, whereby any desired adjustment may be made for a particular jengne suction without aii'eetiiig the adjustment at other degreesrof engine suction. Y

18. In a vali'efstructure for carbu-reiche, the combination of'a fla valve, a swinging connection attacliedto t e outer end thereof, a spring attacliedto said swinging connection, and' means for adjusting the effective length of said spring. .i

19. In a valve structure for carbureters, the combination of apflap valve,`a fiat spring operativelyjassociated therewith -to--maintan the saine in normally closed position, a

curved plate upon which said spring isy iiounted and means for adjusting the' extent. o

contact between said spring and said. plate.

' 20. In a valvestruetureor carburetera the combination of a `Hap-valve@ Hat spring operatively associatedtherewith, a curved taining said `Hap valve in normally closed 3o plate u on which said spring is mounted, position and means for variably increasing means br holding the curved plate in defithe tension on the Hap valve in direct pronite relation to the plane of the flap-valve, portion to the increase in en ine suction,

5 and means for ,varying said angular relation. said means comprising a plurai 421. In a valve structure for carbureters, adapted to compound the -action of the 35 the combination' of al Hap-valve, a membery spring on the valve at a definite point in the pivota'lly connected to the outer face of saidv inward movement of the valve.- valve,a ring operatively associated with 24. In a valve structure for carbureters,

10 said mem er, a mounting for said spring, the combination of a tiap valve pivotally and means 'for .varying the distance between mounted to swing inwardly, a link pivot- 40 of said member.y face of said valve, a member adapted as the 22. An air valve structure for carburters, valve is opened to impinge against the outer -15 comprising-in combination, a rectangular end of the link and depress the same, and

fiap valve for admitting auxiliary air, resilmeans fOI adjusting the distance between the 45 ierrt means for holding said valvein closed outer end 0f sald llnk and said member position, aiplurality of independent adjustwhen the valve 1s in closed position.l ing devices for said resilient means, one de- 25. In a valve structure for carbureters,

20 vice being adapted to control the' movement the combination of a Ha valve, a. swinging .X

df t e v'valve under low engine suction, a connection attached to t e outer end there- 5o second .of said devices being adapted to conof, a spring attached to said swinging con- 'troi the movement of said valve under menection, means for adjusting the effective dium engine suction and a third of said delength of the spring, 'and means for varyf 25.. vices being adapted to control the movement ing the initial tension on spring. of the valve under high'engine suction. In testimony Wher^f I afiix my signa- 55 23. 'An air valve for carbureters compris? ture hereunto. V ing" in combination, an inwardly opening flap valve, a seat therefor, a spring for re- GEORGE H. TABER. 

